Browser Gamma-Correction Test Page

This page aggregates a single row from each of the dozen Browser Gamma-Consistency Test
pages onto a single page for simpler comparisons and screenshots. Unlike
many other gamma test pages, such as Glenn Randers-Pehrson's Browser Gamma Test, this
version is primarily concerned with the self-consistency of web
browsers' gamma correction--i.e., not just of PNGs but also of GIFs and
of HTML and CSS colors. Inconsistencies will be immediately noticeable
as "two-tone" boxes, such as here:

All of the rows on a correctly rendered page should instead look
like this, with no internal edges visible:

The actual test images are below. Click on the links to see explanations
of what any bad row might imply about the browser, as well as to see the
full colorcube for that test.

The first group uses HTML colors (i.e., "BGCOLOR") for the backgrounds of
the table cells holding the test images: